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Help CenterTDD ON-board Wireless Audio Video Conference System
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System description:
TDD On-board video conference equipment wireless transmission system use TDD two-way network transmission technology, Incorporating the latest LTE mobile communications and terrestrial digital TV TDS technical characteristics and advantages, based on independent research and design of a new generation multiple access wireless communication technology, adopting the most advanced coding and modulation at present Multi-user wireless communications field's, TDD-OFDM,LDPC error correcting code,DPD,H.264 coder and decoder nology as core,Assigning channel resources through slot control, through the sub-carrier frequency flexibly assigned to multiple user terminals,Within the same frequency to achieve maximum multiple end users multiple access. Under non-line, real-time two-way high-speed movement transparent information transmission, multiple wireless networks can be integrated with each other layout large network coverage.
System function and characteristics:
1.Diffraction ability,Support two-way communication in a single frequency,High spectrum utilization.
2.Wide coverage, flexible allocation of channel resources to achieve point to point, multipoint, multipoint two-way communication.
3.Powerful error correction capability, using the world's most advanced LDPC error correction code technology, carrier-to-noise ratio QPSK mode threshold of 0.5dB, approaching the theoretical limit communication.
4.Strong anti-fading capability, the system has a strong anti-fading;TDD two-way image transmission technology with respect to the single-carrier frequency domain equalization technology, inherently long delay and strong anti-multipath capability, more suitable for urban environments.
5.Video, audio, data and other multimedia information, high-speed, real-time, synchronous transmission;
6.Good mobility, moving speed faster than 200km / h;
7.Using the latest technology predistortion, reduce the PAPR, improve power amplifier efficiency, TDD-OFDM mode allows the unit to open only in certain time slots, other times you can turn off standby to save power;
8.Using the unique encryption technology, digital signal processing, strong system security, stabilization and reliability;
9.Four network application architecture: a single center station, multi-center station, more remote stations (multiple access) and personal piggyback on-board remote terminal of the networking program;
10.Image quality: HD/SD/D1/Half 720P for optional;
11.GPS data interface: UART (Compatible with beidou system)
System Application:
It can applicated for Public security, fire fighting,traffic warden,Civil air defense emergency, City administration, Monitoring of environment, Water conservation, flood prevention, Power and emergency, Railway emergency rescue, Maritime,Coastguard patrol,The customs border,Dock/Quay monitoring, Forest-fire prevention,Oil field, Military reconnaissance, TV transmit etc.
It is suitable for real-time mobile transmit the high quality image/audio/video in the urban area, seaborne, mountainous region etc complicated environment.
System application form:
The overall transmission path is: Communication vehicle - local command center~total command center. Communication vehicle transmit the video and audio data to the long distance of local command center with microwave frequency. Transmission distance up to 25KM or more (the distance is related to antenna erection, local environment and transmission data.) Communication vehicle also can receive video and audio,data,conferencing systems,command from command center, delivered to mobile communication vehicle’s computer, large-screen display devices and audio equipment etc.Local command center transferred to total command center by MAN or WAN directly, local command center and total command center can real-time monitored video and audio signals via the monitor, or have on video conference.
The 20W indoor base station at the command center maximum support 8-way video and audio communication vehicle return.
Communication vehicle or local command center, total command center all can use network monitoring, access PC to view video and recording etc.
Vehicle-mounted terminal product model: LinkAV-T331S-10W
Terminal product features:
1. Stable power, adjustable dynamic power rate,power range≤43dBm;
2. Support video conference,IP data and NLOS transparent transmission;
3. Support system with frequency or inter frequency networking , automatic roam;
4. Low power consumption design, built in cooling fan, excellent heat exchange, working temperature≤45℃;
5. Integrated design, modular design, device is highly integrated;
6. Encryption: AES 128 bit, (support custom key,through FM plate manually modify)
7. Adaptive dual-mode positioning
Terminal product parameters:
Product parameter | ||
Type |
Item |
Description |
RF parameter |
Working frequency |
300~800MHz(customized) |
Modulation bandwidth |
2 / 4 / 8MHz |
|
Modulation type |
TDD-OFDM |
|
Communication mode |
TDMA full duplex |
|
Power output |
≤43dBm |
|
Flatness in band |
≤ ±0.5dB |
|
Out-of-band spurious |
≤ -36dBm |
|
Third-order inter modulation |
≤ -36dBC |
|
Receive sensitivity |
≤ -100dBm |
|
MER |
≥ 36dB |
|
Anti-frequency interference |
≥ 40dB |
|
|
Transmission bandwidth |
Max 14Mbps |
Data |
Synchronous control |
GPS or Beidou synchronous clock |
Network protocol |
IP/TCP,UDP,HTTP,SMTP etc |
|
Encryption mode |
AES 128-bit(support custom key,through RF plate manually modify) |
|
Encoding |
Video compression |
H.264 |
Image format |
CIF/D1/720P |
|
Audio coding |
64Kbps G.711 |
|
Audio input |
Dual track 12dBm |
|
General specifications |
Working temperature |
-30 ~ +70°C |
Power supply |
100 ~260VAC |
|
Power consumption |
≤ 50W |
|
Size |
2U |
|
Weight |
≤10kg |
|
Interface |
AV input interface |
BNC,SDI or HDMI |
Power interface |
Three core power plug |
|
RF antenna interface |
NF connector |
|
Network interface |
RJ45 |
|
GPS/Beidou antenna interface |
SMA female head |
|
20 Watt TDD Indoor Base Station
Model: LinkAV-TJ340-20W
Product features:
1. Stable power, adjustable dynamic power rate ,power range≤43dBm;
2. IP data and NLOS transparent transmission;
3. Support system with frequency or inter frequency networking;
4. Low power consumption design, built in cooling fan, excellent heat exchange, working temperature≤45℃;
5. Integrated design, modular design,device is highly integrated;
6. Encryption: AES 128 bit (support custom key, through the FM plate manually modify)
7. Single carrier frequency support up to 4 users two-way data transmission simultaneously.
Product parameters:
Product parameters | ||
Type |
item |
Description |
RF parameters |
Working frequency |
300~800MHz(customized) |
Modulation bandwidth |
2 / 4 / 8MHz |
|
Modulation method |
TDD-OFDM |
|
Communication method |
TDMA full duplex |
|
Power output |
≤43dBm |
|
Flatness in band |
≤ ±0.5dB |
|
Band spurious |
≤ -36dBm |
|
Third-order intermodulationDistortion |
≤ -36dBC |
|
Receiving sensitivity |
≤ -100dBm |
|
MER |
≥ 36dB |
|
Adjacent frequency interference |
≥ 40dB |
|
|
Transmission bandwidth |
Max 14Mbps |
Data |
Synchronous control |
GPS or beidou synchronous clock |
Networking protocol |
IP/TCP,UDP,HTTP,SMTP etc. |
|
Encryption method |
AES 128 bit(support custom key, through the FM plate manually modify) |
|
General specs |
Working temperature |
-30 ~ +70°C |
Power input |
100 ~260VAC |
|
Power consumption |
≤ 50W |
|
Size |
2U |
|
Weight |
≤10kg |
|
Interface |
Power interface |
Three core power plug |
RF antenna interface |
NF Adapter |
|
Network interface |
RJ45 |
|
GPS/Beidou antenna interface |
SMA female head |
|
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